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WorksheetsChemistry Challenge
Total questions: 15
Worksheet time: 8mins
Which element is the most abundant in the Earth's crust?
Hydrogen
Oxygen
Aluminum
Silicon
What is the name of the process where a substance changes from a solid to a gas without passing through the liquid phase?
Condensation
Melting
Sublimation
Evaporation
What is the chemical symbol for gold?
Pt
Au
Ag
Fe
How many elements are there in the periodic table?
64
118
92
150
What is the name of the group of organic compounds that contain a hydroxyl group?
Alcohols
Esters
Carboxylic acids
Ketones
Which element is the basis of organic chemistry?
Nitrogen
Hydrogen
Carbon
Oxygen
What is the name of the group of organic compounds that contain a carbonyl group?
aldehydes
carboxylic acids
ketones
alkenes
What type of reaction is the combustion of alkanes?
The combustion of alkanes is a type of precipitation reaction
The combustion of alkanes is an endothermic reaction
The combustion of alkanes is a type of exothermic reaction known as a combustion reaction.
The combustion of alkanes is a type of nuclear reaction
What type of reaction is the addition of hydrogen to an alkene?
The addition of hydrogen to an alkene is a type of reaction known as oxidation.
The addition of hydrogen to an alkene is a type of reaction known as substitution.
The addition of hydrogen to an alkene is a type of reaction known as polymerization.
The addition of hydrogen to an alkene is a type of reaction known as hydrogenation.
What is the general formula for alkynes?
CnH2n+2
CnH2n-1
CnH2n
CnH2n-2
How many significant figures are in the number 0.00540?
5
4
2
3
What element does this Bohr diagram represent? / ¿Qué elemento representa este diagrama de Bohr?
Hydrogen / Hidrógeno
Boron / Boro
Carbon / Carbón
Fluorine / Flúor
1 potassium is needed in order to bond with iodine
True
False
Electrostatic bond is another term for ionic bond
True
False
Helium is a noble gas, that is why it has 8 valence electrons
True
False
